Potassium tert-butoxide, 97%, Thermo Scientific Chemicals

General References:

1. Strong base of relatively low nucleophilicity. Review: Chem. Rev., 74, 45 (1974). The nucleophilicity is increased in the presence of 18-crown-6; the basic strength less so: J. Org. Chem., 43, 447 (1978).
2. For generation of dibromocarbene, see Bromoform, A11904. In combination with a solid-liquid phase-transfer catalyst in the absence of solvent, has been recommended for the dehydrobromination of alkyl bromides to alkenes: J. Org. Chem., 49, 1138 (1984): with 18-crown-6, is effective for the dehydrobromination of vic-dibromides: Liebigs Ann. Chem., 1 (1980), and in the dehydrochlorination of gem-dichloroalkanes to give alkynes: J. Org. Chem., 39, 3285 (1974).
3. Deprotonation of an ɑ-halo sulfone, followed by Ramberg-Backlund reaction with extrusion of SO₂, gives an alkene: J. Am. Chem. Soc., 110, 4866 (1988); Org. React., 25, 1 (1977); Org. Synth. Coll., 8, 212 (1993):
4. For cyclization-elimination of ɑɑ-dibromoneopentyl ketone to di-tert-butylcyclopropenone, a precursor of tri-tert-butylcyclopropenium tetrafluoroborate, see: Org. Synth. Coll., 6, 991 (1988); for reaction scheme, see Neopentyl chloride, L02365.
5. For intramolecular cyclization of a dinitrile to an unsaturated vic-amino nitrile (Thorpe-Ziegler reaction), see: Org. Synth. Coll., 6, 932 (1988).
6. Treatment of a methyl ester in ether with the reagent provides a simple method for preparation of tert-butyl esters: Synlett, 658 (2001).